More from the Global Post:

A total of 20 cubs were born at the Chengdu base this year, and 17 were lucky enough to survive. The first ten days are crucial to a panda cub's survival, as that period is when it's most vulnerable to disease.

To give you some idea of their size, Meng Meng, the oldest, weighs 6.6 lbs, while Ya Yi, the youngest, only weighs 1.5 lbs.